* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4efe9 100%);
            color: #333;
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }
        
        .container {
            max-width: 1000px;
            margin: 0 auto;
        }
        
        header {
            text-align: center;
            margin-bottom: 40px;
            padding: 30px 20px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 2.5rem;
        }
        
        .intro {
            color: #7f8c8d;
            font-size: 1.1rem;
            max-width: 800px;
            margin: 0 auto 20px;
        }
        
        .purpose {
            background: linear-gradient(135deg, #6a89cc 0%, #4a69bd 100%);
            color: white;
            padding: 15px;
            border-radius: 10px;
            margin-top: 20px;
        }
        
        .sponsors-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }
        
        .sponsor-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .sponsor-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
        }
        
        .sponsor-header {
            background: linear-gradient(135deg, #4a69bd 0%, #1e3799 100%);
            color: white;
            padding: 20px;
            text-align: center;
        }
        
        .sponsor-amount {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 5px;
        }
        
        .sponsor-qq {
            font-size: 1.1rem;
            display: block;
            margin-top: 10px;
            color: rgba(255, 255, 255, 0.9);
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .sponsor-qq:hover {
            color: #fff;
            text-decoration: underline;
        }
        
        .sponsor-body {
            padding: 20px;
            text-align: center;
        }
        
        .sponsor-rank {
            display: inline-block;
            background: #f6b93b;
            color: white;
            width: 35px;
            height: 35px;
            line-height: 35px;
            border-radius: 50%;
            font-weight: bold;
            margin-bottom: 15px;
        }
        
        .top-1 .sponsor-header {
            background: linear-gradient(135deg, #f6b93b 0%, #e55039 100%);
        }
        
        .top-2 .sponsor-header {
            background: linear-gradient(135deg, #82ccdd 0%, #60a3bc 100%);
        }
        
        .top-3 .sponsor-header {
            background: linear-gradient(135deg, #b8e994 0%, #78e08f 100%);
        }
        
        .stats {
            background: white;
            padding: 25px;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 30px;
            text-align: center;
        }
        
        .stats h2 {
            color: #2c3e50;
            margin-bottom: 20px;
        }
        
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        
        .stat-item {
            padding: 15px;
            background: #f8f9fa;
            border-radius: 10px;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: #4a69bd;
            margin: 10px 0;
        }
        
        /* 二维码折叠区域样式 */
        .qr-section {
            background: white;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 30px;
            overflow: hidden;
        }
        
        .qr-header {
            padding: 20px;
            background: linear-gradient(135deg, #4a69bd 0%, #1e3799 100%);
            color: white;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s;
        }
        
        .qr-header:hover {
            background: linear-gradient(135deg, #3a59ad 0%, #0e2789 100%);
        }
        
        .qr-header h2 {
            margin: 0;
            font-size: 1.5rem;
        }
        
        .qr-header i {
            transition: transform 0.3s;
        }
        
        .qr-content {
            padding: 0;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease, padding 0.5s ease;
        }
        
        .qr-content.active {
            padding: 30px;
            max-height: 500px;
        }
        
        .qr-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: 30px;
        }
        
        .qr-image {
            flex: 0 0 auto;
            text-align: center;
        }
        
        .qr-image img {
            max-width: 250px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .qr-info {
            flex: 1;
            min-width: 250px;
            text-align: center;
        }
        
        .qr-info h3 {
            color: #2c3e50;
            margin-bottom: 15px;
            font-size: 1.5rem;
        }
        
        .qr-info p {
            margin-bottom: 15px;
            color: #7f8c8d;
            font-size: 1.1rem;
        }
        
        .note {
            background: #fff9e6;
            padding: 15px;
            border-radius: 8px;
            border-left: 4px solid #f6b93b;
            margin-top: 20px;
            text-align: center;
            font-weight: bold;
            color: #e67e22;
        }
        
        footer {
            text-align: center;
            color: #7f8c8d;
            padding: 20px;
            margin-top: 30px;
        }
        
        @media (max-width: 768px) {
            .sponsors-container {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            .qr-container {
                flex-direction: column;
            }
        }
        
        .heart {
            color: #e55039;
            animation: pulse 1.5s infinite;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }